Hillary had advantages on the East Coast but she doesn't have the West Coast as wrapped up. Plus there are many intelligent voters in California who are well-aware of the issues. In other words, the lies told often and artful bamboozles won't work as effectively.
I think Mrs. Clinton (and her handlers) made a tactical decision.
This kind of hubris reflects the certainty of having the contest tied up. She believes that all of the contrivances that lent her undue advantages ensure that the throne is hers, and hers alone.
As a Scorpio, if she did lose, she'd make sure that Sanders paid.
The Clintons were neck deep in the drug trade in Arkansas and there were plenty of bodies buried in that enterprise. Moving on to CIA involvements, support for numerous bloody coups, and other "statecraft" makes them pros in the Personal War Department.
However, Karma happens.
This election may prove the Great Anomaly that so many are waiting for... many of whom thought that transition would come with Obama only to find themselves SORELY betrayed.